Test U: One Or More Parking, Rear Or License Plate Lamp Is Inoperative

PINPOINT TEST U: ONE OR MORE PARKING, REAR OR LICENSE PLATE LAMP IS INOPERATIVE

U1:

U1-U2:

U2-U4:

U4-U6:

Normal Operation
Voltage is supplied to the front lamps from the central junction box (CJB). Voltage is supplied to the rear lamps from the battery junction box (BJB). Voltage is supplied to the LH front side marker and parking lamp through circuits 29S-LF3 (OG/YE), 29S-LF7 (OG/BU), 29S-LF8 (OG) and 29S-LF16 (OG/GN). Ground for the LH front side marker flows through circuit 31S-LF8 (BK/OG) to the front electronic module (FEM). Ground for the LH front parking lamp flows through circuit 31S-LF16 (BK/RD) and then through circuit 31S-LF7 (BK/BU) to the FEM. Voltage is supplied to the RH front side marker and parking lamp through circuits 29S-LF4 (OG/BU), 29S-LF17 (OG/WH) and 29S-LF16 (OG/GN). Ground for the RH front side marker flows through circuit 31S-LF17 (BK/WH) to the FEM. Ground for the RH front parking lamp flows through circuit 31S-LF16 (BK/RD) to the FEM. Voltage is supplied to the LH rear parking lamp through circuit 29S-LF23 (OG). Ground for the LH rear parking lamp flows through circuit 31S-LF11 (BK/WH) to the rear electronic module (REM). Voltage is supplied to the RH rear parking lamp through circuits 29S-LF24 (OG/BK) and 29S-LF23 (OG). Ground for the RH rear parking lamp flows through circuit 31S-LF11 (BK/WH) and then circuit 31S-LF20 (BK/OG) to the REM. Voltage is supplied to the license plate lamps through circuits 29S-LG2 (OG/BU), 29S-LF12 (OG/BK), 29S-LF21 (OG/BK) and 29S-LF22 (OG/BK). Ground for the license plate lamps flows through circuits 31S-LF21 (BK/GN) and 31S-LF22 (BK/GN) and then through circuit 31S-LF12 (BK/GN) to the REM. The FEM and REM control the ground circuits individually for the lamps (the license plate lamps share a common ground controlled circuit at the REM).

Possible Causes
- Fuse
- Circuit 29S-LF8 (OG) open
- Circuit 29S-LF16 (OG/GN) open
- Circuit 31S-LF8 (BK/OG) open or short to voltage
- Circuit 31S-LF16 (BK/RD) open or short to voltage
- Circuit 31S-LF7 (BK/BU) open or short to voltage
- Circuit 29S-LF17 (OG/WH) open
- Circuit 31S-LF17 (BK/WH) open or short to voltage
- Circuit 29S-LF23 (OG) open
- Circuit 31S-LF11 (BK/WH) open or short to voltage
- Circuit 31S-LF20 (BK/OG) open or short to voltage
- Circuit 29S-LF21 (OG/BK) open
- Circuit 29S-LF22 (OG/BK) open
- Circuit 31S-LF12 (BK/GN) open or short to voltage
- Side marker module
- REM
- FEM